66842911 has 8 divisors (see below), whose sum is σ = 68783904. Its totient is φ = 64927200.

The previous prime is 66842863. The next prime is 66842959. The reversal of 66842911 is 11924866.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (66842863) and next prime (66842959).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 66842911 - 2¹¹ = 66840863 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66842981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 891 + ... + 11596.

It is an arithmetic number, because the mean of its divisors is an integer number (8597988).

Almost surely, 2^66842911 is an apocalyptic number.

66842911 is a deficient number, since it is larger than the sum of its proper divisors (1940993).

66842911 is a wasteful number, since it uses less digits than its factorization.

66842911 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12641.

The product of its digits is 20736, while the sum is 37.

The square root of 66842911 is about 8175.7514027764. The cubic root of 66842911 is about 405.8371365023.

The spelling of 66842911 in words is "sixty-six million, eight hundred forty-two thousand, nine hundred eleven".